Device for hermetically sealing metal receptacles for food.



No. 856,688; PATENTED JUNE 11, 1907. G. PARQUHAR & R. NORTH. DEVIGE POR HBRMBTIGALLY sBALNG METAL REGBPTAGLES FOR P001).

APPLIOATION FILED 00T.5. 1906.

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A port may comprise a grid or table mounted of a suitable tap or cock. A pedestal or supkbeing closed so as to prevent the entry of air.

UNITE STATES PTET IFFICE. GEORGE FARQUHAR AND ROBERT NORTH, OF LONDON, ENGLAND.

DEVICE FOR HERMETICALLY spuma METAL HEcEPTAcLrs ma Foon.

Specification of Letters Patent.

` Patented June 11, 1907.

Application filed October 5, 1906. Serial No. 337,522.

To a/ZZ whom t may concern:

Be it known that we, GEORGE FARQUHAR, a subject of the King of Great Britain and Ireland, residing in London, England, and ROBERT NORTH, a subject of the King of Great Britain and Ireland, residing in London, England, have invented certain new and useful Improvements in and Relating to Devices for Hermetically Sealing Metal Receptacles for Food and the Like, of which the following is a specification.

This invention relates to improvements in and relating to devices for hermeticall'y sealing meta receptacles for food and the like, and it has for its object to provide a device whereby the air may be exhausted from the receptacles and the air outlet in said recep-A tacles closed by means of solder, the solder: ing iron being arranged in the exhausting ,chamber and heated in anysuitable manner from the exterior thereof.`

In carrying the invention into effect we employ a chamber of suitable form and construction provided with a bottom capable of `The closure for the bttom aforesaid is connected to the upper end of'a rod attached to a iston working in a suitable cylinder. v The cyilinder is connected to a suitable air exhausting device as is also the chamber before referred to, a valve or cock being emloyedvto regulate thesuction of the air both iiom the cylinder and the chamber. l

Arranged so asvto be within the chamber when the same is closed is a support for the receptacle designed to be sealed, which supupon one end of a rod attached toI a piston Working in a cylinder secured to the closure for the chamber, said chamber being at one end in communication with the external atmosphere and at the other incommunication with the exhausting chamber. The soldering is effected by means of a soldering iron passing through one wall of the chamber and so disposed that the-end thereof is superposed above the opening left in the food receptacle for the extraction of the air. iron is heated by means of a Bunsen or other burner disposed outside the chamber', An air inlet is provided to the chamber, the admission of the air being governed by means port is provided for the chamber.

In order that the invention may be the l The better imderstood drawings are appended in which,

Figure l is a part sectional elevation of a form of the apparatus constructed in accordance with the present invention; and Fig. 2 is a sectional plan of the exhausting cham.

'ber on line A A of Fig. 1.

Referring to the accompanving drawings, Figs. l and 2, a indicates a cylindrical chamber supported by means oi' columns o from a base c. The chamber may be formed entirely of glass a tight joint being maintained between the top e and the bottom f of the chamber by means of lthe bolts f1 and gl, arranged at each corner of plates e and f. To insure an air-tight joint between the respective components of the chamber, rubber or other suitable materiale] may be inserted between the glass and lin'etal: The bottom of the chamber is provided with an opening h for which a closure k1 is provided, said closure being carried by the arms i the ends of which are provided with sleeves i1 which encircle the columns IJ which thus fo'rm guides for the said closure hl. A rubber or other .ring h2 is provided upon the upper surface of the closure so that an air-tight joint may be formed between it and the bottom of chamber a, Secured to the underside of closure 'h1 is a cylinder j in which is placed a piston j attached to a rod jl, to the upper end of which rod is secured the plate j? forming a support upon which is laced the vessel c which it is desired to seaii Thecylinder atits upper end'is in communication' through the opening k1 with the chamber a, and at its opposite end it is in communicationthrough the cock k2 with the external atmosphere. A tube 7c" is also rovided as shown in dotted lines in Fig. 1, t ie said tube communicating at its respective ends with the upper and lower extremities of the cylinder j. A cock 7c* is provided, the urpose of which as will be hereafter descri ed, is to break the vacuum inchamber a.

l indicates a soldering iron through the top oi' the chamber a and is heated from the exterior thereof by Imeans of a Bunsen burner Z1. The end of the iron lis so disposed that when the vessel lc is raised as will be `presently described, theI said iron f comes into contact with and melts the solder closing the aperture in the said .vessel k.

` The movement of the closure 721 is effected by means of a vacuum formed in a cylinder OO which passes IIO 2 seaess connect the conduit and receptacle with the m secured to the base oi the apparatus and suction device whereby the air in the recepi within which is disposed a suitable piston m2 provided with a rod m which at its upper end 1 tacle is exhausted is secured to the lower end of cylinder j "2. Inasoldering apparatus, .the combina- 5 In order to exhaust the chamber a and cylinl tion of a receptacle having a soldering tool 7o der m they are respectively connected l depending from its top and having an openthrough the tubes n nl with an exhaust pump I ing in its bottom, a closure supported to re-- or other suitable device, a valve n2 being prol ciprocate to and from saidopening whereby vided operable by mean's of the handle 'n3 sethe opening can be closed, means for support- 1o cured to the movable disk of said valve. The ing the vessel to be soldered on said closure, 7 5 arrangement of the parts of the valve are a cylinder, a piston in said cylinder, a rod such that as the handle is moved air is iirst l connecting the piston with said clos-ure, a

' of all drawn from the cylinder m upon the conduit leading to said cylinder, a valve upper side of the piston therein. The/said member connected with the conduit, aconcylinder being in communication upon the duit connecting'the valve member with said 8o underside of the piston at m3 with the atmosreceptacle, said valve member being arphere, the piston therein rises carrying with ranged 'to connect the said piston with a sucit the closure nl whichis pressed firmly against tion device whereby the cylinder is exhaustthe bottom of the vessel a. Vhen the closed to cause the piston to raise the closure to zo ing of chamber a has been effected the handle close the receptacle, said valve being also -ar- 85 n3 is moved again and air is drawn from theI ranged to connect the conduit and receptacle said chamber a. The vacuum in cylinder ,i with the suction device whereby the air in is created upon the exhaustion of chamber a, the receptacle is exhausted, and means lowith which the upper'end ofthe said cylinder cated externally of said receptacle for heat- 'is in communication as aforesaid. The vesing the soldering tool that projects down- 9o sel k is kept in contact with the iron Z until ward into the receptacle.

y the solder flows over the opening, when the 3. In a soldering apparatus,'the combinavalve n2 is operated'to disconnect the pump tion of a receptacle, a soldering tool projector't'he like and airis admitted to the cylinder ing through the top into the receptacle, the

through cock k2 and thence by tube k3 to receptacle having' an opening in its bottom, 95 chamber a vcausing the piston in the cylinder a reciprocatable closure arranged to close the j to fall and remove the vessel if out of conopening in the lbottom or' the receptacle, a tact with the soldering iron Z and permitting cylinder projecting downward from said clothe solder to set. The further movement oi' sure, a passage connecting the. upper and v the air valve n2 willl then admit air to the lower portions of the cylinder, a piston in roo cylinder m and the closure is withdrawn said cylinder, a rod connected with said pisfrom the vessel a. ton'and projecting through the closure, a

We iindin practice that it is advantageous support on said rod for the article to be solwhere a pump is employed to extract air dered, an aperture in said closure leading into 40 from the vessel a that a non-return valve be said cylinder, an outlet at the lower part of io 5 inserted in thev connection between said the cylinder controlled by a cock, a second pump and the apparatus as otherwise the cylinder sup orted on the base, a piston in fluctuations in the chamber cause the solder the latter cy inder, a rod connected with the when in a fluid state to be agitated so that it latter piston and secured to the closure memis sometimes difficult to get it always to flow ber whereby tlie latter is reciprocated by the 1 io and close the aperture in the head of the piston, |a valve member, a conduit leading l vessel. from the said receptacle to the valve mem- Having described our invention we claim-z ber, and a conduit leading from the second l. In a soldering apparatus, the combinacylinder above the piston to the valve memtionA of a receptacle having a soldering tool ber, the second. c llnder having an outlet at H5 depending fromits top and having an opening its lower portion elow the piston. in its bottom, a closure supported to recipro- 4. In a soldering apparatus, the combinacate to and from said opening whereby the tion of a receptacle having an opening thereopening can be closed., means for supporting in for admittingthe article to be soldered, a

5 5 the vessel to be soldered on said closure, a yclosure movable to and from said openingfrzo cylinder, a piston in'said cylinder, a rod conand vacuum controlled means for moving the necting the piston with said closure, a conclosure to and from said opening. duit leading to said cylinder, a valve member 5. in a soldering apparatus, the combinaconnected with the conduit, a conduit contion of a receptacle having an opening there- 6o necting the valve member with said recep-v in for admitting the article to be soldered, a i2 5 tacle, said valve member being arranged to closure movable to and from said opening, connect the said piston with a suction device vacuum controlled means for moving the clowhereby the cylinder is exhausted to cause sure to and i'rom said opening, a valve meinthe piston to raisethe closure to close the reber arranged to control the vacuum device, a

,65 ceptacle, said valve being also arranged to conduit'connecting the valve member with 13o the receptacle, the Valve devieebeing also arranged when shifted to another pos/it'ion to.

exhaust the receptacle.

6. In a soldering apparatus, the combination Of a receptacle having an Opening -therein for admitting the article to be soldered, a closure movable to and from said Opening,

and vacuum controlled means for moving theclosure to and from said Opening, and pressure operated means for shiftlng' the article in the receptacle on Withdrawal of the air therein to bring the article to engage the soldering means,

Signed this 17th day ofl September, 1906 in the presence of the two undermentioned r 5 witnesses.

GEORGE EARQUHAR. ROBERT NORTH.

Witnesses:

SOHN H. JAOK, E. H. HARBERT. 

